A.O. Smith BFC Cyclone 120, Installation, User And Service Manual

Page: 82 / 118

9.2.7 Service mode
The Installation engineer uses the SERVICE OPERATION menu to adjust the water heater
CO
2
setting during FULL LOAD and PARTIAL LOAD operation.
Use [ ]:SERVICE OPERATION to display the SERVICE OPERATION menu.
[ ] and [ ] can be used to switch between PARTIAL LOAD and FULL LOAD.
If there is a heat demand, the water heater will first run through a startup cycle, then
continue to operate in FULL LOAD or PARTIAL LOAD mode.
If there is no heat demand, the installation engineer must create one. This can be done by
draining the water heater until it is cold or by temporarily raising the set point using [ ].
After adjustment, the set point must be set back to the original value using [ ].
if you exit the SERVICE OPERATION menu or if no buttons are pressed for a period of 15
minutes, the water heater will revert to the original operating mode.
Temporarily raising the setpoint during FULL LOAD or PARTIAL
LOAD
[ ]:>:SERVICE OPERATION.
Select FULL LOAD or PARTIAL LOAD.
The example below describes the situation for FULL LOAD, which is identical to that
for PARTIAL LOAD.
Confirm with [ENTER].
To create a heat demand, you can temporarily raise the set point using [ ] to e.g.
70ºC.
Confirm with .[ENTER].
After adjusting for the CO
2
value (see section 7.8.4), you must use [ ] to restore
the set point to its original value.
Press [
] twice to return to the MENU menu via the SERVICE OPERATION menu.
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82 Installation, Maintenance and Service part